NAC battery question

[Grant Lenahan]

ooops
On Dec 13, 2006, at 8:44 PM, Huw Powell wrote:

>
>> Let's say 1W average output and 50% efficiency.  1W@ 8 ohms is about 
>> 0.33A (i^2r=P).
>> So 0.33A for a 700A-H battery sounds like 2100 hours x 50% = 1050 
>> hours.
>
> Make that 525 hours for stereo.
>
> Plus the source device.  And the light bulbs in both, if any.
>
> And I think the efficiency factor might be off by an order of 
> magmitude.  Still good for a day or two of continuous running.
>
> A more typical 400 AH battery that is a couple of years old should 
> still hold up for a third of that, say 8-16 hours...
>
> -- 
> Huw Powell
>
> http://www.humanspeakers.com/audi
>
> http://www.humanthoughts.org/